EP0777083A2 - Mélangeur pour brûleur - Google Patents

Mélangeur pour brûleur Download PDF

Info

Publication number
EP0777083A2
EP0777083A2 EP96116865A EP96116865A EP0777083A2 EP 0777083 A2 EP0777083 A2 EP 0777083A2 EP 96116865 A EP96116865 A EP 96116865A EP 96116865 A EP96116865 A EP 96116865A EP 0777083 A2 EP0777083 A2 EP 0777083A2
Authority
EP
European Patent Office
Prior art keywords
mixing device
tube
ring
seal
burner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96116865A
Other languages
German (de)
English (en)
Other versions
EP0777083B1 (fr
EP0777083A3 (fr
Inventor
Paul Bognar
Gisbert Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MEKU VERWALTUNGSGESELLSCHAFT MBH
Original Assignee
MEKU Metallverarbeitungs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MEKU Metallverarbeitungs GmbH filed Critical MEKU Metallverarbeitungs GmbH
Publication of EP0777083A2 publication Critical patent/EP0777083A2/fr
Publication of EP0777083A3 publication Critical patent/EP0777083A3/fr
Application granted granted Critical
Publication of EP0777083B1 publication Critical patent/EP0777083B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/50—Control of recirculation rate

Definitions

  • the invention relates to a mixing device for a burner according to the preamble of claim 1.
  • a mixing device of this type is known from DE 92 12 924 U1.
  • This known mixing device is axially displaceable in the burner tube in order to adjust the passage cross section of recirculation openings through which combustion gases recirculate from the combustion chamber into the flame.
  • the mixing device is carried by an additional pipe socket, which is displaceably and sealedly mounted in the burner pipe via a round cord seal.
  • the elastic round cord seal absorbs the radial tolerances and ensures that it can be moved.
  • This mixing device is complex since the additional pipe socket is required in order to arrange the guiding and sealing as far as possible from the flame and to keep its thermal load low.
  • the invention has for its object to provide an axially adjustable mixing device which is of simple construction and can accordingly be manufactured more cost-effectively.
  • the basic idea of the invention is to guide the disc of the mixing device which shuts off the tube cross section in a sealed manner in the tube by means of a cylindrical metallic ring. Due to its essentially cylindrical design, the ring provides good support and guidance for the disk and thus for the mixing device, and ensures adequate sealing.
  • the metallic material of the ring is thermally resilient, so that the displaceability and sealing are not affected by the heat.
  • the ring preferably has an axially continuous parting line, so that it can simply be drawn onto the circumference of the disk and resiliently rests against the inner wall of the tube. It is also possible to shrink the ring onto the disc.
  • the outer circumferential surface of the ring is expediently cylindrical in its axially central region and slightly rounded toward the front and rear ends.
  • the cylindrical area ensures a good seal, while the crowned ends counteract tilting and jamming during axial displacement.
  • a circumferential bead is expediently formed in the tube and bears against the ring from the outside. This circumferential bead creates a narrow sealing contact zone in the axial direction, which on the one hand ensures a good seal and on the other hand little impedes the axial displacement, since a slight tilting of the mixing device relative to the tube is also possible during the axial displacement.
  • FIG. 1 shows an example of a mixing device which is sealed and axially adjustable in the manner according to the invention.
  • a recirculation tube 12 is attached to the downstream front end of a burner tube 10 by means of a bayonet lock 14.
  • a bayonet lock 14 In the circumference of the burner tube 10, adjacent to the rear end of the recirculation tube 12, recirculation openings 16 are provided, through which combustion gases can be returned from the combustion chamber into the flame burning in the recirculation tube 12.
  • the mixing device has a disc 18 which blocks the cross section of the burner tube 10 and which has a nozzle opening in the center through which the nozzle shaft 20 of the burner is guided.
  • the nozzle shaft 20 is held in a centering hub 22 which is fastened to the disk 18.
  • the combustion air is supplied via the burner tube 10, passes through the air passage openings of the disk 18 into the front nozzle 24 and is mixed with the fuel supplied via the nozzle shaft 20 and fed to the flame burning in the recirculation tube 12.
  • the disk 18 is seated with its outer circumference in a metallic ring 26.
  • the ring 26 has essentially the shape of a short cylinder, which is circumferential by an axially continuous one Parting line 28 is divided.
  • An inner groove 30 running circumferentially in the circumferential direction is provided axially in the center of the inner circumferential surface of the ring 26. With this inner groove 30, the ring 26 engages around the peripheral edge of the disk 18.
  • the outer circumferential surface of the ring 26 is straight cylindrical in the axially central region and is rounded slightly inward at the front and rear edges.
  • the burner tube 10 has a circumferential bead 32 which is slightly pressed inwards. When the mixing device is used, this peripheral bead 32 rests on the outer circumferential surface of the ring 26.
  • the ring 26 is spread slightly by means of the parting line 28 and can thus be pulled over the disk 18.
  • the ring 26 snaps together due to its elasticity and engages around the peripheral edge of the disk 18 with its inner groove 30 resiliently on the inner wall of the burner tube 10.
  • the parting line 28 enables an elastically resilient compensation of the diameter tolerances.
  • the mixing device is positioned in the burner tube 10 in such a way that the ring 26 lies with the cylindrical central region of its outer lateral surface on the peripheral bead 32.
  • An axial displacement of the mixing device in the burner tube 10 is thus possible over a distance which corresponds to the axial width of the central cylindrical region of the outer circumferential surface of the ring 26.
  • the slightly inwardly projecting in the cross section of the burner tube 10 circumferential bead 32 and the crowned ends of the outer circumferential surface of the ring 26 cause a slight axial tilting of the axis of the mixing device relative to the axis of the burner tube 10 during displacement is possible without this leads to a jamming.
  • the axial distance of the peripheral bead 32 from the recirculation openings 16 and the axial width of the ring 26 are coordinated with one another such that the front edge of the ring 26 lies behind the rear edge of the recirculation openings 16 when the mixing device is in the rear end position of its adjustment path. If the mixing device is pushed forward, the front edge of the ring 26 increasingly covers the passage cross section of the recirculation openings 16.
  • the axial width of the cylindrical central region of the outer circumferential surface of the ring 26 is selected so that the adjustment path of the mixing device essentially corresponds to the axial width of the recirculation openings 16, so that adjustment is possible until the recirculation openings 16 are completely closed. A simple adjustment of the recirculation is also possible during operation via the axial displacement of the mixing device.
  • the use of the ring 26 both for guiding the mixing device during the axial displacement and for sealing the mixing device against the burner tube 10 reduces the parts required for the mixing device and thus the manufacturing and assembly costs. Since the ring 26 consists of a metallic material, it can withstand high thermal loads, so that it is possible to arrange the seal by means of the ring 26 in the area of the mixing device near the flame. If the ring 26 is also used at the same time as a closure member for the recirculation openings 16, a further structural part can be saved here as well.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP96116865A 1995-11-29 1996-10-21 Mélangeur pour brûleur Expired - Lifetime EP0777083B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29518918U 1995-11-29
DE29518918U DE29518918U1 (de) 1995-11-29 1995-11-29 Mischeinrichtung für einen Brenner

Publications (3)

Publication Number Publication Date
EP0777083A2 true EP0777083A2 (fr) 1997-06-04
EP0777083A3 EP0777083A3 (fr) 1998-08-19
EP0777083B1 EP0777083B1 (fr) 2001-07-04

Family

ID=8016056

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116865A Expired - Lifetime EP0777083B1 (fr) 1995-11-29 1996-10-21 Mélangeur pour brûleur

Country Status (3)

Country Link
EP (1) EP0777083B1 (fr)
AT (1) ATE202836T1 (fr)
DE (2) DE29518918U1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568941A1 (fr) * 2004-02-28 2005-08-31 BBT Thermotechnik GmbH Dispositif de mélange pour un brûleur à air soufflé à mazout ou à gaz

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29518919U1 (de) * 1995-11-29 1996-01-25 MEKU Metallverarbeitungs-GmbH, 78083 Dauchingen Mischeinrichtung für einen Brenner
DE202006013853U1 (de) * 2006-09-07 2006-12-21 Meku Metallverarbeitungs Gmbh & Co. Kg Mischeinrichtung für einen Brenner

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9212924U1 (de) 1992-09-25 1992-11-26 MEKU Metallverarbeitungs-GmbH, 7735 Dauchingen Mischeinrichtung für einen Brenner

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992020964A1 (fr) * 1991-05-24 1992-11-26 Sci Mercimmo Procede pour la combustion faiblement polluante d'un combustible
DE4209221A1 (de) * 1992-03-21 1993-09-23 Deutsche Forsch Luft Raumfahrt Stickoxidarmer brenner
DE4244400C2 (de) * 1992-12-29 1999-02-04 Deutsch Zentr Luft & Raumfahrt Brenner zur Heißgaserzeugung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9212924U1 (de) 1992-09-25 1992-11-26 MEKU Metallverarbeitungs-GmbH, 7735 Dauchingen Mischeinrichtung für einen Brenner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1568941A1 (fr) * 2004-02-28 2005-08-31 BBT Thermotechnik GmbH Dispositif de mélange pour un brûleur à air soufflé à mazout ou à gaz

Also Published As

Publication number Publication date
DE59607211D1 (de) 2001-08-09
DE29518918U1 (de) 1996-01-25
ATE202836T1 (de) 2001-07-15
EP0777083B1 (fr) 2001-07-04
EP0777083A3 (fr) 1998-08-19

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